1. Arber S, Attias-Donfut C (eds) (2000) The myth of generational conflict. Routledge, London
2. Askham J, Ferring D, Lamura G (2007) Personal relationships in later life. In: Bond J, Peace SM, Dittman-Kohli F, Westerhof GJ (eds) Ageing in society: an introduction to social gerontology, 3rd edn. Sage, London, pp 186–208
3. Baltes PB (1997) On the incomplete architecture of human ontogeny: selection, optimization, and compensation as foundation of developmental theory. Am Psychol 52:366–380
4. Beckmann J, Heckhausen H (2008) Motivation as a function of expectancy and incentive. In: Heckhausen J, Heckhausen H (eds) Motivation and action. Springer, Berlin, pp 99–136
5. Bengtson VL, Mangen DJ (1988) Family intergenerational solidarity revisited. In: Mangen DJ, Bengtson VL, Landry PH (eds) Measurement of intergenerational relations. Sage, Thousand Oaks, pp 222–238